Transmission mechanism.



E. A. MINOR. TRANSMIS$|0N MECHANISM.

APPLICATION FILED OCT.2. I91

Patented Nov. 23, 1915.

2 SHEETS-SHEET I- I v m 70H ,4 HUB/VHS WITNESSES E. A. MINOR. TRANSMISSION MECHANISM.

APPLICATION ,FILED 0cT. 2. 1914.

, Patented Nox}. 23,1915.

2 SHEETS-SHEET 2.

W/Tf s 253 EDWARD ALEXANDER MINOR, 0F :WILDER, VERMONT.

' TRANSMISSION MEeHANIs'M.

To all whom it may concern:

Be it known that I, EDWARD A. MINOR, a citizen of the United States, and a residentof Wilder, in the county of Vindsor and State of Vermont, have invented certain new and useful In'iprovei'nents in Transn1iSSiOn Mechanism, of which the following is a specification.

My invention relates to power transmission mechanism; and the main object thereof is to provide means whereby the speed oftransmission may be made variable in desired degrees of the driven element with respect to a. constantly operated driving element.

A further object is to accomplish thisresult through what is technically known as a planetary gear and a pump gear operating as a variable brake therefor.

A further object is to provide external means for varying the efl'ect of said pump gear.

A further object is to provide means for locking said pump gear against operation, whereby the transmission of power from Specification of Letters Patent.

one element to the other is correspondingly.

effected. I

My invention is fully described in the following specification, of which the accomoan in drawin 's' form a Jart, in whichthe separate parts are designated by the same reference characters in each of the views, and in which Figure 1 is a longitudinal, vertical, section taken through a variable clutch constructed in accordance with my present invention, on the line 11 of Fig. 2; Fig. 2

is a plan section taken on the Fig. 1; Fig. 3 is a section taken on the line 3-3 of Fig. 1; and Fig. 4 is an outside elevation thereof.

In the drawings forming a part of this application Ihave shown a present pre-. ferred form of embodiment of my invention comprising a casing 5 having two shafts 6 and 7 rotatable therein and arranged in the same axis, the former having a spur gear 8 keyed thereto withinsaid casing, and the latter having a disk 9 keyed thereto and line 22 of this free revolution of said member being bearing upon the adjacent surface of the gear 8, and said disk carries a plurality of spur pinions 10 upon shafts 11, which pinions are enmeshed with the gear 8. Arranged around the said plnions is an an nular member 12 having an internal gear 13 enmeshed with said 1311110118 and an external gear 14 which .is in close contact with the ulterior walls of a chamber 15 1n said casing, said chamber being in communication with anoil tank or reservoir 16 by.

.ber 26,.between the passages l'i and 18, and

within which is a spur pinion 27 upon a shaft 28 whlch carrles a ratchet 29 on 1ts end exterior of said casing, and the teeth of said ainion 27 closelv en 'a e the'walls of 1 a: is

said chamber 26 and are enmeshed with the teeth of the external gear 14, whereby complemental operation results.

Arranged upon the shaft 30 of the rotary valve 21 is a pawl 31 which is adapted to be moved against the ratchet 29 and thereby prevent the revolution of said ratchet and, thus, of the gear member 12, through the medium of the pinion 27, said pawl being so set, with respect to the shaft 30, as not to contact with said ratchet until the rotary valve 21 has been entirely actuated in its closing movement.

When the rotary valve 21 is open, as

shown, power applied to the driving shaft,

6 revolves the gear 8, and pinions 10 and,

if thegear member 12 is free to revolve, the

driven shaft 7 is not aifected, but remains stationary in view of the revolution of said member 12 in the direction of the arrow X,

due to the freedom of movement or flow of the fluid through the passage 18, chamber 15, and passage 17, from and to the tank or reservoir 16. Should, however, the rotary valve 21 be partially closed, this flow of the fluid is correspondingly aifected, with a consequentretardation of the revolution of the gear member 12, and the pinions 10 begin an epicyclic movement,',carry ing the disk 9 therewith and, accordingly, the driven shaft 7 the speed of this epicyclic movement being 'inthe degree of retardation of the gear member 12 which is controlled by the degree of oiosure of the rotary valve 21 and, when said valve is fully closed, the gear member 12 revolves only at the rate of speed permitted by the Patented Nov. 23, 1915. Application filed October 2, 1914. Serial No. 864,610.

relatively negligible amount of fluid passing between the external gear 14 thereof,

and the pinion 27; if it is desired to positively stop the gear member 12, all that is necessary is to continue the closure movement of the lever 22 until the pawl 31 is engaged with the ratchet 29, and the shaft 7 is then being driven at its maximum speed.

In Fig; 1 I have illustrated a bypass 32 around a portion of the chamber 15, andthe object of which is to eliminate excess Wear, due to all the pressure .of the resistance of the flow of the 'fiuid, on one side of the gear member 12, but it will be noted thatthe fluid passing through saidgby-pass enters the passage 17' at a point [between i the gear member 12 and the rotaryyalve 21.

' It will thus be seen that I provide a planetary gear for transmitting motion from one shaft to another, and that I also provide a variablebrake for the outer element of said planetary gear, whereby the speed of the transmitted motion is under control,

said brake being a gear pump having one of its passages adapted to be closed or opened in any degree in order to increase or decrease the speed of transmitted motion,

While I- have shown certain details of construction, I do not limit myself thereto,

but may make changes thereover, within the scope of the following claim, without said gear on the other shaft, a gear member provided with an internal gear enmeshed with said pinions, and with an external gear, a pinion enmeshed with said external gear,

said casing having a fluid passage around; said gearmember, and a passage on each 4 side of said last named pinion, and a valve -,in one of said passagesfor controlling the flow of fluid tocorrespondingly control the speed of revolution of said gear? member and,thereby, of said driven shaft. 1 I

In testimony whereof I have, signed my name to this specifications-in the presence of-a two; subscribing witnesses.

EDWARDALEXANDER MINOR. I Witnesses: I

I 1 SAML E. PINGREE,

. JESSIE G; TURNER. 

